OLD SAYBROOK, Conn. (WTNH) — A criminal investigation is underway at a biochemical supplier on Center Road West in Old Saybrook.

Old Saybrook police arrived at LabDIRECT LLC at 3 p.m. Wednesday, and nearby businesses were shut down an hour later. The ATF assisted the state police bomb squad in setting off two controlled explosions Thursday morning. The bomb squad and fire department left soon after that, but as of Thursday night, police and hazmat crews remain on scene.

“I can’t comment much on the situation while it’s ongoing beyond saying there was never any spill or incident, no injuries, and there was never any hazard to public safety,” Richard Carboni, the owner and director of LabDIRECT LLC said. “We have always and are currently cooperating fully with all relevant authorities to try to resolve any issues.”

A worker at a nearby company said he was first told to come into work Thursday at noon, then was told to go home because they were still closed.

Old Saybrook Police Chief Michael Spera said his agency is conducting the criminal investigation and confirmed there is no danger to the public.

A portion of Center Road West had been closed due to the investigation but it has since reopened.

This is a developing story. Check back for updates.